History and Strategy of Sonic Corporation Sonic Corp. franchises and operates the United States' largest chain of drive-in restaurants and the fifth largest hamburger chain. As of August 31, 2000 there were 2,172 Sonic restaurants, of which 1,860 were owned and operated by independent franchisees; the remainder were
History and Strategy of Sonic Corporation Sonic Corp. franchises and operates the United States' largest chain of drive-in restaurants and the fifth largest hamburger chain. As of August 31, 2000 there were 2,172 Sonic restaurants, of which 1,860 were owned and operated by independent franchisees; the remainder were